Rediscovery of 'Prostanthera staurophylla' F.Muell. and reinstatement of 'P. teretifolia' Maiden & Betche (Lamiaceae)

A population of 'Prostanthera staurophylla' was recently rediscovered in the Mt Mackenzie area near Tenterfield on the Northern Tablelands of New South Wales. A detailed morphological comparison of these plants with the previously known population occurring in the Torrington area revealed that the populations were morphologically sufficiently distinct from each other to be recognised as separate species. 'Prostanthera teretifolia' is reinstated as a distinct species, separate from 'P. staurophylla'. The former species occurs near Torrington, whereas, 'P. staurophylla' is restricted to the Mt Mackenzie area near Tenterfield. Descriptions, botanical illustrations and comments on the conservation status of each species are provided.